Author: Simey Lameze
MDL-66034 core_role: implement capability assigned event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7b0afca8165cf84e2bd043d812356c3b893db976
http://github.com/moodle/moodle/commit/7b0afca8165cf84e2bd043d812356c3b893db976
+ 3.8 en [eventcapabilityassigned,core_role]